/*************************************************************************/
/*  thread.h                                                             */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/
#ifndef THREAD_H
#define THREAD_H


#include "typedefs.h"
/**
	@author Juan Linietsky <reduzio@gmail.com>
*/

#include "ustring.h"

typedef void (*ThreadCreateCallback)(void *p_userdata);



class Thread {
public:

	enum Priority {

		PRIORITY_LOW,
  		PRIORITY_NORMAL,
		PRIORITY_HIGH
	};

	struct Settings {

		Priority priority;
		Settings() { priority=PRIORITY_NORMAL; }
	};



	typedef uint64_t ID;

protected:
	static Thread* (*create_func)(ThreadCreateCallback p_callback,void *,const Settings&);
	static ID (*get_thread_ID_func)();
	static void (*wait_to_finish_func)(Thread*);
	static Error (*set_name_func)(const String&);

	friend class Main;

	static ID _main_thread_id;


	Thread();
public:

	virtual ID get_ID() const=0;

	static Error set_name(const String &p_name);
	_FORCE_INLINE_ static ID get_main_ID() { return _main_thread_id; } ///< get the ID of the main thread
	static ID get_caller_ID(); ///< get the ID of the caller function ID
	static void wait_to_finish(Thread *p_thread); ///< waits until thread is finished, and deallocates it.
	static Thread * create(ThreadCreateCallback p_callback,void * p_user,const Settings& p_settings=Settings()); ///< Static function to create a thread, will call p_callback


	virtual ~Thread();

};

#endif

